2017/18 ICD-10-CM Diagnosis Code G01

Meningitis in bacterial diseases classified elsewhere

ICD-10-CM Coding Rules
Code First
Code First Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
  • underlying disease
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as G01. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • meningitis (in):
  • gonococcal (
    ICD-10-CM Diagnosis Code A54.81

    Gonococcal meningitis

      2016 2017 2018 Billable/Specific Code
    A54.81
    )
  • leptospirosis (
    ICD-10-CM Diagnosis Code A27.81

    Aseptic meningitis in leptospirosis

      2016 2017 2018 Billable/Specific Code
    A27.81
    )
  • listeriosis (
    ICD-10-CM Diagnosis Code A32.11

    Listerial meningitis

      2016 2017 2018 Billable/Specific Code
    A32.11
    )
  • Lyme disease (
    ICD-10-CM Diagnosis Code A69.21

    Meningitis due to Lyme disease

      2016 2017 2018 Billable/Specific Code
    A69.21
    )
  • meningococcal (
    ICD-10-CM Diagnosis Code A39.0

    Meningococcal meningitis

      2016 2017 2018 Billable/Specific Code
    A39.0
    )
  • neurosyphilis (
    ICD-10-CM Diagnosis Code A52.13

    Late syphilitic meningitis

      2016 2017 2018 Billable/Specific Code
    A52.13
    )
  • tuberculosis (
    ICD-10-CM Diagnosis Code A17.0

    Tuberculous meningitis

      2016 2017 2018 Billable/Specific Code
    Applicable To
    • Tuberculosis of meninges (cerebral)(spinal)
    • Tuberculous leptomeningitis
    Type 1 Excludes
    • tuberculous meningoencephalitis (A17.82)
    A17.0
    )
  • meningoencephalitis and meningomyelitis in bacterial diseases classified elsewhere (
    ICD-10-CM Diagnosis Code G05

    Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere

      2016 2017 2018 Non-Billable/Non-Specific Code
    Code First
    • underlying disease, such as:
    • human immunodeficiency virus [HIV] disease (B20)
    • poliovirus (A80.-)
    • suppurative otitis media (H66.01-H66.4)
    • trichinellosis (B75)
    Type 1 Excludes
    • adenoviral encephalitis, myelitis and encephalomyelitis (A85.1)
    • congenital toxoplasmosis encephalitis, myelitis and encephalomyelitis (P37.1)
    • cytomegaloviral encephalitis, myelitis and encephalomyelitis (B25.8)
    • encephalitis, myelitis and encephalomyelitis (in) measles (B05.0)
    • encephalitis, myelitis and encephalomyelitis (in) systemic lupus erythematosus (M32.19)
    • enteroviral encephalitis, myelitis and encephalomyelitis (A85.0)
    • eosinophilic meningoencephalitis (B83.2)
    • herpesviral [herpes simplex] encephalitis, myelitis and encephalomyelitis (B00.4)
    • listerial encephalitis, myelitis and encephalomyelitis (A32.12)
    • meningococcal encephalitis, myelitis and encephalomyelitis (A39.81)
    • mumps encephalitis, myelitis and encephalomyelitis (B26.2)
    • postchickenpox encephalitis, myelitis and encephalomyelitis (B01.1-)
    • rubella encephalitis, myelitis and encephalomyelitis (B06.01)
    • toxoplasmosis encephalitis, myelitis and encephalomyelitis (B58.2)
    • zoster encephalitis, myelitis and encephalomyelitis (B02.0)
    G05
    )
The following code(s) above G01 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to G01:
  • G00-G99
    2018 ICD-10-CM Range G00-G99

    Diseases of the nervous system

    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the nervous system
ICD-10-CM G01 is grouped within Diagnostic Related Group(s) (MS-DRG v35.0):

Convert G01 to ICD-9-CM

Code History
ICD-10-CM Codes Adjacent To G01
F98.8 Other specified behavioral and emotional disorders with onset usually occurring in childhood and adolescence
F98.9 Unspecified behavioral and emotional disorders with onset usually occurring in childhood and adolescence
F99 Mental disorder, not otherwise specified
G00 Bacterial meningitis, not elsewhere classified
G00.0 Hemophilus meningitis
G00.1 Pneumococcal meningitis
G00.2 Streptococcal meningitis
G00.3 Staphylococcal meningitis
G00.8 Other bacterial meningitis
G00.9 Bacterial meningitis, unspecified
G01 Meningitis in bacterial diseases classified elsewhere
G02 Meningitis in other infectious and parasitic diseases classified elsewhere
G03 Meningitis due to other and unspecified causes
G03.0 Nonpyogenic meningitis
G03.1 Chronic meningitis
G03.2 Benign recurrent meningitis [Mollaret]
G03.8 Meningitis due to other specified causes
G03.9 Meningitis, unspecified
G04 Encephalitis, myelitis and encephalomyelitis
G04.0 Acute disseminated encephalitis and encephalomyelitis (ADEM)
G04.00 Acute disseminated encephalitis and encephalomyelitis, unspecified

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.